Concrete and asphalt mixer



H. M. DRUCE.

CONCRETE AND ASPHALT MIXER. APPLICATION FILED JULY 10, 1922.

Lifi fi fiu Patented 0@1;.17,1922.

2 SHEETS-SHEET I.

H. M. DRUCE.

CONCRETE AND ASPHALT MIXER.

APPLICATION FILED JULY 10, 1922.

1,432,328,, Patented Oct. 117 1922.

e50 2 4 :51 3 10 w m in: ml 3 2 l .l a 5 Q ll Patented (Dot. 1?, 1922.

HAROLD IM. BRUCE, OF SAN ANTONIO, TEXAS.

CONCRETE AND ASPHALT MIXER.

Application filed July 10,

T 0 all whom it may concern:

Be it known that I, HAROLD M. Dance, a citizen of the United States, and resident of San Antonio, in the county of Bexar and State of Texas, have invented certain new and useful Improvements in Concrete and Asphalt Mixers, of which the following is a specification.

My invention relates to that type of concrete or asphalt mixers in which a charge is mixed in a container which is then dumped, after which the same operation is repeated.

An object of my invention is to provide means whereby the container will be automatically cleaned while it is being dumped, thereby avoiding the necessity of stopping the operation of'the device to clean the container.

Another object of the invention is to provide mixing blades within the container which will be rotated during the dumping operation.

Another object is to provide simple means whereby the mixing and dumping operations are both performed from the same source of power.

Other objects will be apparent from the following detailed description and the ap pended claims.

In the drawings:

Figure 1 is a top plan view of the device.

Figure 2 is an end elevation thereof.

Figure 3 is a vertical section on the line 33 of Figure 1.

Figure 4 is a cross section on the line -l l of Figure 1, but showing the container inverted for dumping the charge.

A trough like shell or container 1 of general U-shape asshown in Figures 2 and 4: has fastened to its ends bearing members 2 and 3 mounted to rotate on fixed eccentric bushings at and 5. These bushings are mounted in the upper ends of generally triangular supporting members 6 and 7. The bushings may be held in position in bearings in these supports in any suitable manner as by the means 8 shown in Figure 3. Fastened by a spline 9 to the bearing member 3 is a worm gear 10 with which meshes a worm 11 on a shaft 12. This shaft is mounted at one end in bearings 13 on the support 6 and at its other end in a bearing 14 forming part of an auxiliary support 15 attached to the support 6. A bevel gear 16 is aiiiXed to the end of the shaft 12 and 1922. Serial No. 573,995.

meshes with a bevel gear 17 loose on the end of a shaft 18 mounted at one end in a bearing 19 in the auxiliarysupport 15. At the other end of the shaft '18 is a pulley 20 to which power is transmitted from any suitable source by a belt 21 or in any equivalent manner.

The shaft 18 also carries fixed thereto a gear wheel 22 which meshes with a gear wheel 23 fast on a blade shaft 2 1 which is mounted to rotate freely in the eccentric bushings a and 5. Connected to the bevel gear 17 is a clutch member 25 also loose on the shaft, and a cooperating clutch member 26 is splined to the shaft 18 to-rotate therewith but slide thereon. This clutch member is movable by a lever 27 pivoted to an arm 28 extending from, the auxiliary support 15. When the two clutch members are in engagement the worm will be rotated to turn the bearings of the container and I dump the container.

. Fast to the shaft 24 are pairs of blades or paddles 29 and 30, each adjacent pair 0 being set at right angles to the pairs at each side. These blades may be mounted on the shaft in any desired manner, but as shown each individual blade 'is provided with a half collar 31 or 32 and the collars 31 and 32 are drawn tightly into engagement with the shaft by bolts 33. The blades are mounted on their supports at an angle of about 60 as shown at 30 in Figure 1 or 29 in Figure 3. A much more thorough 9O mixing is thereby obtained.

In operation the container is supplied with the materials to be mixed and the shaft 24 is rotated, thereby rotating all of the mixing blades and thoroughly agitating the contents of the container. This iscontinued until the materials are sufficiently mixed. The clutch member 26 is then brought into engagement with the clutch member 25 and power is transmitted through shaft 18, gears 17 and 16, shaft 12, worm 11 and worm gear 10 to the bearings of the container 1. This rotates the container and after 90 of movement it will be upside down as shown in Figure 4, thus dumping the charge. During this turning movement of the container, its bearings turn on the eccentric bushings 4; and 5 which causes a movement of the bottom of the container toward the shaft 24:. This brings the blades to a position where they substantially scrape the bottom of the container as shown in through the container,

Figure 4, and since the blades are constantly rotating relatively to the container during the turning movement of the latter, it necessarily follows that the container is automatically cleaned.

The blades may be of whatever shape is found desirable according to the use to which the device is put, and the container may be of any desired length and size. It will be noted that the invention provides a simple mixing device in which the blades and the container are rotated from'the same source of power, and in which the container is automatically cleaned during the dump ing operation. The mixer may be used for either concrete, asphalt or similar materials as desired. It is obvious that various changes in size, proportions, and materials may be made without departing from the spirit of the invention, and in general the invention is to be regarded as limited only by the scope of the appended claims.

I claim as my invention:

1. A concrete or asphalt -mixing device comprising suitable supports, eccentric bushings mounted in said supports, a container, bearings for said container mounted to'rotate on said eccentric bushings, a shaft mounted in said bushings and extending through the container, blades fastened to said shaft, means for rotating said shaft, means for rotating the container, and. a common source of power for both of said means.

2. A concrete or asphalt mixing device comprising suitable supports, eccentric bushings mounted in said supports, a container, bearings for said container mounted to rotate on said eccentric bushings, ashaft mounted in said bushings and extending blades fastened to said shaft, a gear fastened to said shaft, a worm fastened to one of said container bearings, and means for transmitting power from a common source tothe gear and the worm.

3. A concrete or asphalt mixing device comprising suitable supports, eccentric bushings mounted in said supports, a container mounted to rotate onsaid bushings, a shaft mounted in the bushings and extendingthrough the container, mixing blades on said shaft, and means for rotating the shaft and container and automatically cleaning the container as rotated.

4. A concrete and asphaltmixing device comprising a container, mixing means within the container, means for rotating the mixing means, means for tilting the container, and means whereby the container is:

automatically cleaned only when it is in a tilted position.

5. A concrete and asphalt mixing device comprising a container, mixing blades with in the container, means for rotating the mixing blades, means for tilting, the container, and means causing the blades to automatically clean the container only when the latter is in a tilted position.

6. A concrete and asphalt mixing device comprising a container, mixing means within the container normally out of contact with the interior thereof, means for rotating the mixing means, means for rotating the container, and means whereby the mixing means is brought into contact with the interior of the container when the latter is rotated, thereby cleaning the same.

In testimony whereof, I have hereunto subscribed my name.

HAROLD M. DEUCE. 

